Screen Mask Movable Frame Tension Control
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Solution Overview
Problem
Conventional screen masks lack precise control over tension, leading to potential detachment or reinstallation issues during the screen printing process, which affects the accuracy and efficiency of pattern formation on substrates.
Innovation Solution
A screen mask design featuring a movable frame system with multiple moving frames that can adjust tension in at least two perpendicular directions, supported by a ball screw mechanism driven by a motor for precise control, allowing for adjustable tension without reattaching or replacing the mask.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed mask frame is used to support the mask, then the structure is simple and manufacturing cost is low, but the tension of the mask cannot be adjusted once attached
Solution Approach 1:
The mask frame is designed with movable frames that can dynamically adjust their position along rails, transforming the static fixed structure into a dynamic adjustable system. This allows the tension of the mask to be modified by moving the movable frames to different positions, resolving the contradiction between structural simplicity and tension adaptability.
Solution Approach 2:
The mask frame is divided into a fixing frame and multiple movable frames that can independently adjust. This segmentation allows specific portions of the frame to be adjusted without moving the entire structure, maintaining manufacturing simplicity while enabling localized tension adjustments.
2Reliability
If the mask is erroneously attached or tension changes during screen printing, then the mask must be reattached or discarded, but this causes loss of time and reduced productivity
Solution Approach 1:
The ability to dynamically adjust tension during the process prevents mask detachment and positioning issues, eliminating the need to stop production for reattachment. This maintains reliability while continuously preserving productivity by keeping the mask in optimal condition throughout the screen printing process.
Solution Approach 2:
The system allows real-time monitoring and adjustment of mask tension during screen printing. When tension deviations or positioning issues are detected, the movable frames can be adjusted to correct the problem, creating a feedback loop that maintains optimal conditions without interrupting production flow.
3Measurement precision
If multiple moving frames are added to control tension in two directions, then tension control precision is improved, but the device complexity increases
Solution Approach 1:
The complex two-dimensional tension control is achieved by segmenting the adjustment mechanism into independent movable frames that operate on perpendicular rails. Each movable frame handles adjustment in one direction, simplifying the control of each individual component while achieving comprehensive two-dimensional tension control through their coordinated operation.
Solution Approach 2:
The movable frames serve multiple functions: they provide structural support for the mask, enable tension adjustment in their respective directions, and can be controlled independently or collectively. This multi-functionality reduces the need for separate adjustment mechanisms for each direction, managing device complexity while achieving precise two-dimensional tension control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise control over mask tension, reducing the need for reinstallation and improving the efficiency and accuracy of the screen printing process by maintaining consistent tension and position, thus enhancing production efficiency and reducing costs.
Implementation Method 1
The first carriage and the second carriage may be moved by a ball screw
Data Source
AI summary
A screen mask for screen printing includes a mask, and a frame configured to support the mask with a tension; the frame including a fixing frame and a moving frame configured to support the mask and movably mounted on the fixing frame, wherein the tension is controlled by the moving frame.